Are write() calls guaranteed atomic?

[stolz at i2.informatik.rwth-aachen.de (Volker Stolz)]

In local.freebsd-hackers, you wrote:
> Thanks for the info, very helpful!  What reference did you get that from? 
> I searched high and low to find a definitive answer (like the one above)
> before posting.

You can find an online version of the Single Unix Specification v3 at
http://www.unix-systems.org/version3/online.html (although it's kind of
hard to guess that you need that document from the write(2) man page).
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rage against the finite state machine